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Cosmic microwave background offers evidence of gas flowing in galaxy clusters
The cosmic microwave background (CMB) is a faint glow in the universe dating back to roughly 380,000 years after the Big Bang, long before stars or galaxies emerged.
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Researchers at Columbia University analyzed cosmic microwave background data and found a signal that may arise from internal gas motions within galaxy clusters. The signal, detected in the CMB fluctuations, aligns with the rotational kinematic Sunyaev‑Zel'dovich effect, a phenomenon previously hinted at by other studies. The findings were published in Physical Review Letters and add support to earlier evidence of gas motion in these massive gravitationally bound systems.
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